Combination fuel pump and crank case ventilator



March 1, 1932. B. H ZEIBIG ET AL COMBINATION FUEL PUMP AND CRANK CASEVENTILATOR Filed May 25, 1929 Patented Mar. 1, 1932 UNITED STATES PATENTOFFICE BRUNO HENRY ZEIBIG AND JOSEPH ZUBATY, 0F FLINT, MICHIGAN,ASSIGNORS TO A C SPARK PLUG COMPANY, OF FLINT,

MICHIGAN, A COMPANY OF MICHIGAN COMBINATION FUEL PUMP AND CRANK CASEVENTILATOR Application filed Kay 23,

This application relates to fuel pumps suitable for use in connectionwith automotive engines, and the like; and more particularly to fuelpumps which are directly applied to crankcases in such manner as topermit the operation of said pumps by means of levers or likereciprocable members extending into said crankcases; and the inventionaims more particularly to obviate any accumulation of moisture or othercondensates within said fuel pumps. It may also aid in temperaturecontrol.

Other objects of the invention (which may ordinarily rely upon theprinciple of the venturi and may serve for the ventilation of crankcasesas well as fuel pumps and/or may incidentally provide for a conductionof vapors containing gasoline, or the like, to a manifold or otherremote part) may be best appreciated from the following description ofillustrative embodiments of said invention, taken in connection with theappended claims and the accompanying drawings.

Fig. 1 is. for the most part. a vertical section through the body of onepopular type of fuel pump. as this may be modified to embody orillustrate the present invention.

Fig. 2 is a view taken substantially as indicated by the line 2-2 ofFig. 1. but showing features of modification hereinafter referred to.

Fig. 3 is a detail view. corresponding to a lower right-hand portion ofFig. 1, but showing other features of modification.

Fig. 4 is a vertical sectional view; corresponding to a lower portion ofFig. 1. but suggesting an alternative and removable form of the Venturidevice.

Fig. 5 is a view comparable with Fig. 4, but showing a Venturi devicesomewhat like that of, Fig. 4 as differently oriented. and showing alsoan optional pipe connection.

Conventional parts of the organization illustrated in Fig. 1 include areciprocatory pumping elementin the form of a diaphragm 10. shown asretained between amain struc tural element 11 in the form of a pumpbody. and a subsidiary structural element 1:?,providing a pump chamber13 and also servingto support a fuel filtering unit 14.

1929. Serial No. 365,533.

The subsidiary structural element 12 may pumping element, may benormally advanced (subject to any pressure built up in the pump chamber13) by resilient means such as a spring 26,-shown as engaging the cuppedelement 22 and a fixed stop :27; and pressuredetermined orotherwisevariable intake strokes may be imparted thereto ,(from, forexample, an actuating element such as a lever 28, engaging a cam 29within a crankcase 30) through a thrust-refusing connection such as apair of links 31 and 32 shown as centrally interconnected by a pivot andas terminally connected, by additional pins 34, 35, to the handlingelement 20 and to aninner end or arm 28 of the lever 28. Alignment ofthe pins 33, 34 and 35 may be prevented by means such as a stop 36, onthe links 32, tangentially or otherwise engaging a cooperating face uponthe link 31; and the lever 28 may be constantly pressed into engagementwith the cam '29, or its equivalent, by means such as a compressionspring 36', shown as confined between a cupped bottom plate 37 and anoppositely cupped element 38, engaging a projection 39 upon the leverarm 28'. Said lever is shown as pivoted upon a pin 40, in bearingopenings 11, 41, extending at right angles to an opening 12, leadingfrom the interior of the crankcase into a lower compartment 43 of thepump body 11.

Coming now to the more novelfeatures shown in Fig. 1. a small opening 41being optionally provided for the admission of air into the mentionedcompartment 43, some suitable plug. 45, formed of felt or the like, maybe inserted in the opening 42, and saturated, or permitted to becomesaturated. with oil. In the embodiment here referred to, the plug 45,assumedto have been provided with an opening for pin 40, is shown asinserted past a conical surface 48. Said plug may be resilientlycompressed during its insertion and it may seat against a collar 49,-optional- 1y cast integral with the body 11. A Venturi organization/16,communicating with additional opening 47, is shownas comprising afunnel-shaped intake element 50,and a similar but smaller exit element51,these being connected by a passage 52 with which the menwhich the pinextends is shown at 53, in j Figs. 1 and 2, as substantially cylindricalin general form, its cylindrical axis'being at right angles to that ofthe pin 40; and the plug may be correspondingly apertured and/or formedin separate sections adapted to be assembled in the manner aboveimplied. The pin-receiving portion 53a of the alternative organizationshown in Fig.3 is

generally spherical in form; a plug comprising like sections 450 and 45amay be retained between washers 54d and 55a; and, assuming the former toengage a fixed stop 49a, wash er 55a vmay resemble somewhat a Welch plugin themanner of its insertion pasta conical or other surface 48a and/ormto a groove 56a, if provided.

In the form shown in Fig. 4, the provision of opening 44?) and the useof a plug in the opening 42?) being alike optional, the bottom plate orspring-receiving cup 37?) is shown as carrying, or as modified toconstitute, a Venturi organizationincludin'g a funnel element 506 havinga constricted passage 52b with which an opening 47?) communicates,theresult being a withdrawal of air, vapors, or the like, therethrough.

In Fig. 5, in connection with which it may be assumed that the directionof advance, in

view of the position of attachment of the pump body 110, is unfavorableto the use of a funnel positioned in the manner of funnel 50 as inFigures 1 and 2 or funnel 5015 as in Figure 4:; and opening 470 is shownas having connected therewith an air-circulating pipe 57c,whieh may leadto an engine manifold, or other remote part adapted to utilize any fuelvalues in the withdrawn air or vapors; or, alternatively, air may beadmitted through the pipe 570 and permitted to exit through opening 440,opening 420 and/or an,

opening 47c,the latter leading into a Venturi passage 520, shown asextending at right angles to the passage 5%, illustrated in Fig. 4. Tofacilitate its attachment at anydesired angle, the plate 3760 may beprovided with equidistant openings for screws 550, or equivalent means;and it will be understood that it suflicient oil saturation of thementioned plugs, if they are used, may result from their position ofuse. They should be resilient; but need not be impermeable.

In Fig. 1 and Fig. 2, attention may be called to the optional provisionof removable plugs 56, 56 in openings 44, 57, to permit the connectionof an air delivering or air withdrawing pipe, such as is shown at57c,the Venturi organization 46 being then rendered inoperative in favorof circulation through said pipe; and it is obviously possible toutilize a Venturi bottom plate, of .the type shown in Figs. 4 and 5, inconnection with other parts shown in any of the mentioned figures. Allforms of the invention being adapted to ventilate a pump body, theincidental ventilation of a crankcase and the utilization of vaporsshould be regarded as optional.

Although the foregoing description has included mention of but a limitednumber-of the embodiments ofthe present invention, it will be seen notonly'that various features thereof might be independently used, but alsothat numerous modifications, additional to those suggested, might easilybe devised by workers skilled in the art to which this case relates,-allwithout involving departure from the scope of the present invention.

We claim:

1. In a combination: a fuel pump body attached to a crankcase; and meansfor ad vancing air through said body to ventilate the same,said meanscomprising 'a Venturi organization secured to said body.

2. In a combination: an engine crank case,

a fuel pump body attached thereto; and means for advancin air throughsaid body,there being a closa le passagebetween said crankcase and saidbody and an additional air passage communicating with the interior ofsaid body.

4. In a combination: a fuel pump body suitable for attachment toa'crankcase; and means for advancing air through said body, said meansincluding a Venturi funnel cast integral with said body. e I

'5. In a combination: a fuel pump body suitable for attachment to acrankcase; and means for advancing air 1 through said body,said meansincluding a venturi which is separate from said pump body.

6. In 'combination: an engine crankcase, a fuel 1pump comprising a bodyattached to said cran operating lever for said pump pivoted to said pumpbody and extendin through said opening; and a-closure there or.

7 In combination: a fuel pump compriscase and having an opening thereto;an

ing a body suitable for attachment to a crankcase and having an openingthereto, an operating lever for said pump extending through saidopening, and permeable means for closing said opening.

8. In combination: a fuel pump comprising a body suitable for attachmentto a crankcase and having an opening thereto, an operating lever forsaid pump extending through said opening, and resiliently yieldablemeans for closing said opening.

9. A fuel pump comprising a diaphragm pump element, a fluid pumpingchamber on one side of the diaphragm; and means for the withdrawal ofvapors from the other side of the diaphragm, for utilization elsewhere.

10. In combination: a fuel pump comprising a body suitable forattachment to a crankcase and having an opening thereto, an opcratinglever for said pump extending through said'opening, and resilientlyyieldable means for closing said opening, said lever being theresubstantially circular in cross-sectional outline.

- 11. In a fuel pump, a diaphragm, a fluid pumping chamber above saiddiaphragm,

and a chamber below said diaphragm housing operating connectionsthereto, and means to advance air through said latter chamber toventilate the same.

12. In a fuel pump assembly, an engine crankcase, a fuel pump attachedthereto comprising a reciprocable diaphragm for advancing fuel, and anoperating lever for said diaphragm extending into said crank casethrough an opening therein, and means to advance air through said fuelpump independently of the' advancing fuel to ventilate the pump andwithdraw vapors from said crank case.

13. In a fuel pump, a pumping member, a fluid pumping chamber on oneside of said pumping member, a chamber on the other side of said pumpingmember housing operating connections thereto, and means to advance airthrough said latter chamber to ventilate the same. p

14:. In a fuel pump assembly, an engine crankcase, a fuel pump attachedthereto comprising a pumping member for advancing fuel and operatingmeans for said pumping member, a portion of said fuel pump communicatingwith the interior of said crankcase, and means to advance air throughsaid fuel pump to ventilate the pump and withdraw vapors from saidcrankcase.

In testimony whereof We aflir our signatures. 60 BRUNO HENRY ZEIBIG.

JOSEPH ZUBATY.

